Beer mug



FIG. 1 is a front perspective view of a beer mug showing the new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a side sectional view thereof taken along line 5-5 of FIG. 3. 

CLAIM The ornamental design for a beer mug, as shown and described. 